EP1306885A2 - Phosphor composition for low-pressure discharge lamp - Google Patents

Phosphor composition for low-pressure discharge lamp Download PDF

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Publication number
EP1306885A2
EP1306885A2 EP02022653A EP02022653A EP1306885A2 EP 1306885 A2 EP1306885 A2 EP 1306885A2 EP 02022653 A EP02022653 A EP 02022653A EP 02022653 A EP02022653 A EP 02022653A EP 1306885 A2 EP1306885 A2 EP 1306885A2
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Prior art keywords
phosphor
doped
phosphor composition
composition according
weight fraction
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German (de)
French (fr)
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EP1306885A3 (en
EP1306885B1 (en
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Wolfgang Gruber
Matthias Schliplage
Martin Dr. Zachau
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Osram GmbH
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Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/74—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing arsenic, antimony or bismuth
    • C09K11/75—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing arsenic, antimony or bismuth containing antimony
    • C09K11/76—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing arsenic, antimony or bismuth containing antimony also containing phosphorus and halogen, e.g. halophosphates
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/74—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing arsenic, antimony or bismuth
    • C09K11/75—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing arsenic, antimony or bismuth containing antimony
    • C09K11/755—Halogenides
    • C09K11/756—Halogenides with alkali or alkaline earth metals
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7728—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing europium
    • C09K11/7734—Aluminates
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7766—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
    • C09K11/7774—Aluminates
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7766—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
    • C09K11/778—Borates
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/38—Devices for influencing the colour or wavelength of the light
    • H01J61/42—Devices for influencing the colour or wavelength of the light by transforming the wavelength of the light by luminescence
    • H01J61/44—Devices characterised by the luminescent material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/38—Devices for influencing the colour or wavelength of the light
    • H01J61/42—Devices for influencing the colour or wavelength of the light by transforming the wavelength of the light by luminescence
    • H01J61/48—Separate coatings of different luminous materials

Definitions

  • the invention is based on a phosphor composition according to the Preamble of claim 1.
  • a Phosphor composition for generating light with a color temperature greater than 5000 K and a very good general color rendering index Ra greater than 90, the phosphor composition having a Halophosphate phosphor, an emitting in the red wavelength range Phosphor and one emitting in the blue-green wavelength range Fluorescent included.
  • the luminous flux should be as high as possible.
  • the difficulty now is that high luminous flux and very good color rendering meet contrary requirements are because a high luminous flux has a maximum light intensity in the Greens demand good color rendering but one of the blackbody radiation similar distribution of light intensity on all wavelengths presupposes and thus stands in the way of the first claim.
  • the phosphor composition should also be in one layer be applicable to the discharge vessel.
  • the weight fraction of the Eu-doped barium magnesium aluminate phosphor BaMgAl 10 O 17 : Eu in the overall phosphor composition is advantageously between 1% and 20%, better between 3% and 15%.
  • a CeMgAl 11 O 19 : Tb cermagnesium aluminate phosphor doped with Tb is particularly suitable as the green-emitting phosphor doped with Tb.
  • the proportion by weight of CeMgAl 11 O 19 : Tb doped with Tb cermagnesium aluminate in the total phosphor composition should be between 1% and 20%, advantageously between 2% and 15%.
  • the phosphor of the phosphor composition emitting in the blue-green radiation region should be an Eu-doped strontium aluminate phosphor Sr 4 Al 14 O 25 : Eu, the weight fraction of the Eu-doped strontium aluminate phosphor Sr 4 Al 14 O 25 : Eu being advantageous of the total phosphor composition should be between 10% and 50%, better between 20% and 40%.
  • a calcium halophosphate phosphor doped with Mn Ca 5 (PO 4 ) 3 (F, Cl): Sb, Mn is particularly suitable as the halophosphate phosphor for the features required here.
  • the phosphor composition can include one or more Contain phosphors that emit in the invisible spectral range. This enables the spectrum of the Approach the sun with regard to its UV component.
  • the phosphor composition is preferably in the form of a single one Phosphor mixture applied to the inside of the discharge vessel and consists of a single layer.
  • the inside of the discharge vessel facing lower layer consists only of the halophosphate phosphor.
  • the top layer facing the discharge should then also contain the halophosphate phosphor and the other phosphors of the phosphor mixture contain.
  • a protective layer made of Al 2 O 3 , Y 2 O 3 or a side earth oxide should be applied between the inside of the discharge vessel and the phosphor layer.
  • the following figure shows the spectrum of a fluorescent lamp with a phosphor coating, the coating being composed of a phosphor mixture with the following constituents in% by weight: Sr 4 Al 14 O 25 : Eu 28.5% by weight (Ce, Gd) (Zn, Mg) B 5 O 10 : Mn 28.5% by weight Ca 5 (PO 4 ) 3 (F, Cl): Sb, Mn 26.9% by weight BaMgAl 10 O 17 : Eu 6.1% by weight CeMgAl 11 O 19 : p 10.0% by weight

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Luminescent Compositions (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

The composition for generating light with a color temperature of greater than 5000 K and a color rendering index (Ra) of greater than 90 has one halophosphate phosphor that emits in the red wavelength region and another that emits in the blue-green wavelength region. A Eu-doped barium magnesium aluminate phosphor and a Tb-doped green-emitting phosphor are present in the halophosphate phosphor.

Description

Technisches GebietTechnical field

Die Erfindung geht aus von einer Leuchtstoffzusammensetzung gemäß dem Oberbegriff des Anspruchs 1. Es handelt sich dabei insbesondere um eine Leuchtstoffzusammensetzung zur Erzeugung von Licht mit einer Farbtemperatur von größer 5000 K und einem sehr guten allgemeinen Farbwiedergabeindex Ra von größer 90, wobei die Leuchtstoffzusammensetzung einen Halophosphat-Leuchtstoff, einen im roten Wellenlängenbereich emittierenden Leuchtstoff und einen im blaugrünen Wellenlängenbereich emittierenden Leuchtstoff beinhaltet.The invention is based on a phosphor composition according to the Preamble of claim 1. This is in particular a Phosphor composition for generating light with a color temperature greater than 5000 K and a very good general color rendering index Ra greater than 90, the phosphor composition having a Halophosphate phosphor, an emitting in the red wavelength range Phosphor and one emitting in the blue-green wavelength range Fluorescent included.

Stand der TechnikState of the art

Neben der Anforderung nach einer sehr guten Farbwiedergabe muss hierbei auch der Lichtstrom möglichst hoch sein. Die Schwierigkeit liegt nun darin, dass hoher Lichtstrom und sehr gute Farbwiedergabe gegenläufige Anforderungen sind, weil ein hoher Lichtstrom eine maximale Lichtintensität im Grünen fordert, gute Farbwiedergabe aber eine der Schwarzkörperstrahlung ähnliche Verteilung der Lichtintensität auf allen Wellenlängen voraussetzt und somit der ersten Forderung entgegensteht. In addition to the requirement for very good color rendering, this must be done the luminous flux should be as high as possible. The difficulty now is that high luminous flux and very good color rendering meet contrary requirements are because a high luminous flux has a maximum light intensity in the Greens demand good color rendering but one of the blackbody radiation similar distribution of light intensity on all wavelengths presupposes and thus stands in the way of the first claim.

Darstellung der ErfindungPresentation of the invention

Es ist Aufgabe der vorliegenden Erfindung, eine Leuchtstoffzusammensetzung gemäß dem Oberbegriff des Anspruchs 1 bereitzustellen, mit der sich bei Niederdruckentladungslampen maximale Lichtausbeuten bei gleichzeitig sehr gutem allgemeinen Farbwiedergabeindex Ra von größer 90 erzielen lassen. Die Leuchtstoffzusammensetzung sollte dabei außerdem in einer Schicht auf das Entladungsgefäß aufbringbar sein.It is an object of the present invention to provide a phosphor composition to provide according to the preamble of claim 1 with low-pressure discharge lamps maximum luminous efficacy at the same time very good general color rendering index Ra of greater than 90 can be achieved. The phosphor composition should also be in one layer be applicable to the discharge vessel.

Diese Aufgabe wird bei einer Leuchtstoffzusammensetzung mit den Merkmalen des Oberbegriffs des Anspruchs 1 durch die Merkmale des kennzeichnenden Teils des Anspruchs 1 gelöst. Besonders vorteilhafte Ausgestaltungen finden sich in den abhängigen Ansprüchen.This task is accomplished with a phosphor composition with the characteristics of the preamble of claim 1 by the features of the characterizing Part of claim 1 solved. Particularly advantageous configurations can be found in the dependent claims.

Durch die zusätzliche Verwendung eines mit Eu dotierten Bariummagnesiumaluminat-Leuchtstoffs BaMgAl10O17:Eu und eines mit Tb dotierten grün emittierenden Leuchtstoffs in der Leuchtstoffzusammensetzung werden die geforderten Merkmale erfüllt.By additionally using an Eu-doped barium magnesium aluminate phosphor BaMgAl 10 O 17 : Eu and a Tb-doped green-emitting phosphor in the phosphor composition, the required characteristics are met.

Vorteilhaft liegt dabei der Gewichtsanteil des mit Eu dotierten Bariummagnesiumaluminat-Leuchtstoffs BaMgAl10O17:Eu an der gesamten Leuchtstoffzusammensetzung zwischen 1% und 20% besser zwischen 3% und 15%.The weight fraction of the Eu-doped barium magnesium aluminate phosphor BaMgAl 10 O 17 : Eu in the overall phosphor composition is advantageously between 1% and 20%, better between 3% and 15%.

Als mit Tb dotierter grün emittierende Leuchtstoff eignet sich insbesondere ein mit Tb dotierter Cermagnesiumaluminat-Leuchtstoff CeMgAl11O19:Tb. Der Gewichtsanteil des mit Tb dotierten Cermagnesiumaluminat-Leuchtstoffs CeMgAl11O19:Tb an der gesamten Leuchtstoffzusammensetzung sollte dabei zwischen 1% und 20%, vorteilhaft zwischen 2% und 15% liegen.A CeMgAl 11 O 19 : Tb cermagnesium aluminate phosphor doped with Tb is particularly suitable as the green-emitting phosphor doped with Tb. The proportion by weight of CeMgAl 11 O 19 : Tb doped with Tb cermagnesium aluminate in the total phosphor composition should be between 1% and 20%, advantageously between 2% and 15%.

Zur weiteren Verbesserung der Farbwiedergabe sollte der im blaugrünen Strahlungsbereich emittierende Leuchtstoff der Leuchtstoffzusammensetzung ein mit Eu dotierter Strontiumaluminat-Leuchtstoff Sr4Al14O25:Eu sein, wobei vorteilhaft der Gewichtsanteil des mit Eu dotierten Strontiumaluminat-Leuchtstoffs Sr4Al14O25:Eu an der gesamten Leuchtstoffzusammensetzung zwischen 10% und 50%, besser zwischen 20% und 40% betragen sollte.To further improve the color rendering, the phosphor of the phosphor composition emitting in the blue-green radiation region should be an Eu-doped strontium aluminate phosphor Sr 4 Al 14 O 25 : Eu, the weight fraction of the Eu-doped strontium aluminate phosphor Sr 4 Al 14 O 25 : Eu being advantageous of the total phosphor composition should be between 10% and 50%, better between 20% and 40%.

Weitere Verbesserungen in Bezug auf die Farbwidergabe können durch Zugabe eines mit Mn dotierten Cergadoliniumzinkmagnesiumpentaborat-Leuchtstoffs (Ce,Gd)(Zn,Mg)B5O10:Mn für den in roten Strahlungsbereich emittierender Leuchtstoff erreicht werden, wobei dieser Leuchtstoff einen Anteil von 5% bis 60%, besser von 10% bis 40% an der gesamten Leuchtstoffzusammensetzung haben sollte.Further improvements with regard to color rendering can be achieved by adding a Mn-doped Cergadoliniumzincmagnesiumpentaborat phosphor (Ce, Gd) (Zn, Mg) B 5 O 10 : Mn for the phosphor emitting in the red radiation range, this phosphor having a share of 5 % to 60%, better from 10% to 40% of the total phosphor composition.

Als Halophosphat-Leuchtstoff für die hier geforderten Merkmale eignet sich insbesondere ein mit Mn dotierter Calciumhalophosphat-Leuchtstoff Ca5(PO4)3(F,Cl):Sb,Mn.A calcium halophosphate phosphor doped with Mn Ca 5 (PO 4 ) 3 (F, Cl): Sb, Mn is particularly suitable as the halophosphate phosphor for the features required here.

Zusätzlich kann die Leuchtstoffzusammensetzung einen oder mehrere Leuchtstoffe enthalten, die im nicht sichtbaren Spektralbereich emittieren. Dadurch lässt sich mit der Leuchtstoffzusammensetzung das Spektrum der Sonne hinsichtlich seines UV-Anteils annähern.In addition, the phosphor composition can include one or more Contain phosphors that emit in the invisible spectral range. This enables the spectrum of the Approach the sun with regard to its UV component.

Die Leuchtstoffzusammensetzung ist bevorzugt in Form einer einzigen Leuchtstoffmischung auf den Innenseite des Entladungsgefäßes aufgebracht und besteht dabei aus einer einzigen Schicht.The phosphor composition is preferably in the form of a single one Phosphor mixture applied to the inside of the discharge vessel and consists of a single layer.

Es kann aber auch von Vorteil sein, die Leuchtstoffbeschichtung in Form von zwei Schichten aufzubringen, wobei die der Innenseite des Entladungsgefäßes zugewandte Unterschicht nur aus dem Halophosphatleuchtstoff besteht. Die der Entladung zugewandte Deckschicht sollte dann ebenfalls den Halophosphatleuchtstoff und die anderen Leuchtstoffe der Leuchtstoffmischung enthalten. However, it can also be advantageous to use the phosphor coating in the form of to apply two layers, the inside of the discharge vessel facing lower layer consists only of the halophosphate phosphor. The top layer facing the discharge should then also contain the halophosphate phosphor and the other phosphors of the phosphor mixture contain.

Zusätzlich sollte zwischen der Innenseite des Entladungsgefäßes und der Leuchtstoffschicht eine Schutzschicht aus Al2O3, Y2O3 oder einem Seitenerdoxid aufgebracht sein.In addition, a protective layer made of Al 2 O 3 , Y 2 O 3 or a side earth oxide should be applied between the inside of the discharge vessel and the phosphor layer.

Beschreibung der ZeichnungenDescription of the drawings

Im folgenden soll die Erfindung anhand eines Ausführungsbeispiels näher erläutert werden.In the following, the invention will be described in more detail using an exemplary embodiment are explained.

In der nachfolgenden Figur ist das Spektrum einer Leuchtstofflampe mit einer Leuchtstoffbeschichtung dargestellt, wobei sich die Beschichtung aus einer Leuchtstoffmischung mit folgenden Bestandteilen in Gew.% zusammensetzt : Sr4Al14O25:Eu 28,5 Gew.% (Ce,Gd)(Zn,Mg)B5O10:Mn 28,5 Gew.% Ca5(PO4)3(F,Cl):Sb,Mn 26,9 Gew.% BaMgAl10O17:Eu 6,1 Gew.% CeMgAl11O19:Tb 10,0 Gew.% The following figure shows the spectrum of a fluorescent lamp with a phosphor coating, the coating being composed of a phosphor mixture with the following constituents in% by weight: Sr 4 Al 14 O 25 : Eu 28.5% by weight (Ce, Gd) (Zn, Mg) B 5 O 10 : Mn 28.5% by weight Ca 5 (PO 4 ) 3 (F, Cl): Sb, Mn 26.9% by weight BaMgAl 10 O 17 : Eu 6.1% by weight CeMgAl 11 O 19 : p 10.0% by weight

Die Intensität I (maximale Intensität auf 1 genormt) der Strahlung ist hierbei in Abhängigkeit von der Wellenlänge X in nm in 5 nm-Schritten aufgezeigt. Mit dieser Leuchtstoffmischung ist eine hohe Lichtausbeute von 62 lm/W erreichbar. Keiner der speziellen Farbwiedergabefaktoren R1 bis R16 weist einen Wert kleiner gleich 92 auf, wobei sich ein allgemeiner Farbwiedergabefaktor Ra8 für die ersten acht Wiedergabefaktoren R1 bis R8 von 96,3 und Ra14 für die ersten vierzehn Wiedergabefaktoren R1 bis R14 von 95,9 ergibt. Die Koordinaten des Farborts für diese Leuchtstoffmischung betragen x = 0,334 und y = 0,351.The intensity I (maximum intensity standardized to 1) of the radiation is here as a function of the wavelength X in nm in 5 nm steps. With this phosphor mixture there is a high luminous efficacy of 62 lm / W reachable. None of the special color rendering factors R1 to R16 have a value less than or equal to 92, which is a general color rendering factor Ra8 for the first eight display factors R1 to R8 from 96.3 and Ra14 for the first fourteen rendering factors R1 to R14 of 95.9. The coordinates of the color location for this phosphor mixture are x = 0.334 and y = 0.351.

Claims (19)

Leuchtstoffzusammensetzung für Niederdruckentladungslampen mit hoher Lichtausbeute zur Erzeugung von Strahlung mit einer Farbtemperatur von größer 5000 K und einem sehr guten allgemeinen Farbwiedergabeindex Ra größer 90, wobei die Leuchtstoffzusammensetzung zumindest einen Halophosphat-Leuchtstoff, einen im roten Wellenlängenbereich emittierenden Leuchtstoff und einen im blaugrünen Wellenlängenbereich emittierenden Leuchtstoff beinhaltet, dadurch gekennzeichnet, dass die Leuchtstoffzusammensetzung zusätzlich einen mit Eu dotierten Bariummagnesiumaluminat-Leuchtstoff BaMgAl10O17:Eu und einem mit Tb dotierten grün emittierenden Leuchtstoff beinhaltet.A phosphor composition for low-pressure discharge lamps with high luminous efficacy for generating radiation with a color temperature of greater than 5000 K and a very good general color rendering index Ra greater than 90, the phosphor composition comprising at least one halophosphate phosphor, one phosphor emitting in the red wavelength range and one phosphor emitting in the blue-green wavelength range , characterized in that the phosphor composition additionally contains a barium magnesium aluminate phosphor BaMgAl 10 O 17 : Eu doped with Eu and a green-emitting phosphor doped with Tb. Leuchtstoffzusammensetzung nach Anspruch 1, dadurch gekennzeichnet, dass der Gewichtsanteil des mit Eu dotierten Bariummagnesiumaluminat-Leuchtstoffs BaMgAl10O17:Eu an der gesamten Leuchtstoffzusammensetzung zwischen 1% und 20% liegt.The phosphor composition according to claim 1, characterized in that the weight fraction of the barium magnesium aluminate phosphor BaMgAl 10 O 17 : Eu doped with Eu is between 1% and 20% of the total phosphor composition. Leuchtstoffzusammensetzung nach Anspruch 1, dadurch gekennzeichnet, dass der Gewichtsanteil des mit Eu dotierten Bariummagnesiumaluminat-Leuchtstoffs BaMgAl10O17:Eu an der gesamten Leuchtstoffzusammensetzung zwischen 3% und 15% liegt.The phosphor composition according to claim 1, characterized in that the weight fraction of the barium magnesium aluminate phosphor BaMgAl 10 O 17 : Eu doped with Eu is between 3% and 15% of the total phosphor composition. Leuchtstoffzusammensetzung nach Anspruch 1, dadurch gekennzeichnet, dass die Leuchtstoffzusammensetzung für den im blaugrünen Spektralbereich emittierenden Leuchtstoff einen mit Eu dotierten Strontiumaluminat-Leuchtstoff Sr4Al14O25:Eu beinhaltet. The phosphor composition according to claim 1, characterized in that the phosphor composition for the phosphor emitting in the blue-green spectral range contains an Eu-doped strontium aluminate phosphor Sr 4 Al 14 O 25 : Eu. Leuchtstoffzusammensetzung nach Anspruch 4, dadurch gekennzeichnet, dass der Gewichtsanteil des mit Eu dotierten Strontiumaluminat-Leuchtstoffs Sr4Al14O25:Eu an der gesamten Leuchtstoffzusammensetzung zwischen 10% und 50% liegt.The phosphor composition according to claim 4, characterized in that the weight fraction of the strontium aluminate phosphor doped with Eu Sr 4 Al 14 O 25 : Eu in the total phosphor composition is between 10% and 50%. Leuchtstoffzusammensetzung nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass der Gewichtsanteil des mit Eu dotierten Strontiumaluminat-Leuchtstoffs Sr4Al14O25:Eu an der gesamten Leuchtstoffzusammensetzung zwischen 20% und 40% beträgt.The phosphor composition according to claim 4 or 5, characterized in that the weight fraction of the strontium aluminate phosphor doped with Eu Sr 4 Al 14 O 25 : Eu in the total phosphor composition is between 20% and 40%. Leuchtstoffzusammensetzung nach Anspruch 1, dadurch gekennzeichnet, dass der mit Tb dotierte grün emittierende Leuchtstoff ein mit Tb dotierter Cermagnesiumaluminat-Leuchtstoff CeMgAl11O19:Tb ist.Phosphor composition according to claim 1, characterized in that the Tb-doped green emitting phosphor is a Tb-doped Cermagnesium aluminate phosphor CeMgAl 11 O 19 : Tb. Leuchtstoffzusammensetzung nach Anspruch 6 oder 7, dadurch gekennzeichnet, dass der Gewichtsanteil des mit Tb dotierten Cermagnesiumaluminat-Leuchtstoffs CeMgAl11O19:Tb an der gesamten Leuchtstoffzusammensetzung zwischen 1% und 20% liegt.The phosphor composition according to claim 6 or 7, characterized in that the weight fraction of the CeMgAl 11 O 19 : Tb doped with cermagnesium aluminate phosphor: Tb in the total phosphor composition is between 1% and 20%. Leuchtstoffzusammensetzung nach Anspruch 6, 7 oder 8, dadurch gekennzeichnet, dass der Gewichtsanteil des mit Tb dotierten Cermagnesiumaluminat-Leuchtstoffs CeMgAl11O19:Tb an der gesamten Leuchtstoffzusammensetzung zwischen 2% und 15% liegt.The phosphor composition according to claim 6, 7 or 8, characterized in that the weight fraction of the CeMgAl 11 O 19 : Tb doped with Termium cermagnesium aluminate: Tb in the total phosphor composition is between 2% and 15%. Leuchtstoffzusammensetzung nach Anspruch1 dadurch gekennzeichnet, dass die Leuchtstoffzusammensetzung für den im roten Spektralbereich emittierenden Leuchtstoff einen mit Mn dotierten Cergadoliniumzinkmagnesiumpentaborat-Leuchtstoff (Ce,Gd)(Zn,Mg)B5O10:Mn beinhaltet. The phosphor composition according to claim 1, characterized in that the phosphor composition for the phosphor emitting in the red spectral range contains a Mn-doped cergadolinium zinc magnesium pentaborate phosphor (Ce, Gd) (Zn, Mg) B 5 O 10 : Mn. Leuchtstoffzusammensetzung nach Anspruch 10, dadurch gekennzeichnet, dass der Gewichtsanteil des mit Mn dotierten Cergadoliniumzinkmagnesiumpentaborat-Leuchtstoffs (Ce,Gd)(Zn,Mg)B5O10:Mn an der gesamten Leuchtstoffzusammensetzung zwischen 5% und 60% liegt.The phosphor composition according to claim 10, characterized in that the weight fraction of the Mn-doped cergadolinium zinc magnesium pentaborate phosphor (Ce, Gd) (Zn, Mg) B 5 O 10 : Mn in the total phosphor composition is between 5% and 60%. Leuchtstoffzusammensetzung nach Anspruch 10, dadurch gekennzeichnet, dass der Gewichtsanteil des mit Mn dotierten Cergadoliniumzinkmagnesiumpentaborat-Leuchtstoffs (Ce,Gd)(Zn,Mg)B5O10:Mn an der gesamten Leuchtstoffzusammensetzung zwischen 10% und 40% liegt.Phosphor composition according to claim 10, characterized in that the weight fraction of the Mn-doped cergadolinium zinc magnesium pentaborate phosphor (Ce, Gd) (Zn, Mg) B 5 O 10 : Mn in the total phosphor composition is between 10% and 40%. Leuchtstoffzusammensetzung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Leuchtstoffzusammensetzung als Halophosphat-Leuchtstoff einen mit Sb und Mn dotierten Calciumhalophosphat-Leuchtstoff Ca5(PO4)3(F,Cl):Sb,Mn beinhaltet.Phosphor composition according to one of the preceding claims, characterized in that the phosphor composition contains as a halophosphate phosphor a calcium halophosphate phosphor doped with Sb and Mn Ca 5 (PO 4 ) 3 (F, Cl): Sb, Mn. Leuchtstoffzusammensetzung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Leuchtstoffzusammensetzung zusätzlich einen oder mehrere Leuchtstoffe enthält, die im nicht sichtbaren Spektralbereich emittieren.Phosphor composition according to one of the preceding claims, characterized in that the phosphor composition additionally contains one or more phosphors which emit in the invisible spectral range. Niederdruckentladungslampe mit einer auf der Innenseite des Entladungsgefäßes aufgebrachten Leuchtstoffbeschichtung, dadurch gekennzeichnet, dass die Leuchtstoffbeschichtung aus einer Leuchtstoffzusammensetzung gemäß einem oder mehreren der Ansprüche 1 bis 14 besteht. Low-pressure discharge lamp with a phosphor coating applied to the inside of the discharge vessel, characterized in that the phosphor coating consists of a phosphor composition according to one or more of Claims 1 to 14. Niederdruckentladungslampen nach Anspruch 15, dadurch gekennzeichnet, dass die Leuchtstoffzusammensetzung in Form einer einzigen Leuchtstoffmischung auf den Innenseite des Entladungsgefäßes aufgebracht ist.Low-pressure discharge lamps according to claim 15, characterized in that the phosphor composition is applied in the form of a single phosphor mixture to the inside of the discharge vessel. Niederdruckentladungslampe nach Anspruch 15, dadurch gekennzeichnet, dass die Leuchtstoffbeschichtung aus einer einzigen Schicht besteht.Low-pressure discharge lamp according to claim 15, characterized in that the phosphor coating consists of a single layer. Niederdruckentladungslampe nach Anspruch 15, dadurch gekennzeichnet, dass die Leuchtstoffbeschichtung aus zwei Schichten besteht, wobei die der Innenseite des Entladungsgefäßes zugewandte Unterschicht nur aus dem Halophosphatleuchtstoff besteht, die der Entladung zugewandte Deckschicht den Halophosphatleuchtstoff und die anderen Leuchtstoffe der Leuchtstoffmischung enthält.Low-pressure discharge lamp according to claim 15, characterized in that the phosphor coating consists of two layers, the lower layer facing the inside of the discharge vessel consisting only of the halophosphate phosphor, the cover layer facing the discharge containing the halophosphate phosphor and the other phosphors of the phosphor mixture. Niederdruckentladungslampe nach Anspruch 15, dadurch gekennzeichnet, dass zwischen der Innenseite des Entladungsgefäßes und der Leuchtstoffschicht eine Schutzschicht aus Al2O3, Y2O3 oder einem Seltenerdoxid aufgebracht ist.Low-pressure discharge lamp according to claim 15, characterized in that a protective layer made of Al 2 O 3 , Y 2 O 3 or a rare earth oxide is applied between the inside of the discharge vessel and the phosphor layer.
EP02022653A 2001-10-23 2002-10-09 Phosphor composition for low-pressure discharge lamp Expired - Lifetime EP1306885B1 (en)

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CA2409289A1 (en) 2003-04-23
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US6794810B2 (en) 2004-09-21
US20030076029A1 (en) 2003-04-24
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DE50212177D1 (en) 2008-06-12
EP1306885B1 (en) 2008-04-30

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